Specification Sheet August 2003

Flow Computer Division

Website: www.EmersonProcess.com/flow

3:IOB2

24-Channel I/O Card (FloBoss 503 & 504)The 24-Channel I/O (Input/Output) Card provides 24inputs and outputs for expanded monitoring andcontrol applications. The card is intended for usewith the FloBoss 503 and 504. The I/O cardprovides these additional I/O channels:

♦ 8 Analog Inputs – AIs.♦ 2 Analog Outputs – AOs.♦ 2 Pulse Inputs – PIs.♦ 2 Discrete Inputs – DIs.♦ 2 Relay Discrete Outputs – DOs.♦ 8 Selectable DI/DOs.

The parameters of the I/O channels are configuredusing ROCLINK for Windows ConfigurationSoftware. Refer to Specification Sheet 4:RLFW.

The I/O card uses a microprocessor for monitoring,controlling, and acquiring data from external devicesconnected to the I/O channels, as well as forrelaying the information to and from the mainprocessor card. The I/O channels have removableplug-in terminal blocks for field wiring. Sockets for AIscaling resistors are provided on the back of the I/Ocard, along with switches for the selectable DI/DOchannels.

The I/O card receives its power from the mainprocessor card. The processor is isolated fromnoisy I/O circuits by optical coupling and a DC/DCpower converter, which supplies power for most ofthe I/O circuits. External 24-volt loop power can beconnected for the AI circuits; otherwise, 12-volt looppower is supplied by the DC/DC converter.

24-Channel I/O Card D30

1146

X01

2

Specification Sheet Page 23:IOB2

Vs

+

-

I LIMIT

-

+

+T

250 OHM

AI

DOC0098J

B1-B8

Analog Inputs

Analog Inputs (AIs) monitor current loop and voltageinput devices, such as pressure and temperaturetransmitters.

The I/O card AIs each consist of a current sourceand a multiplexed A/D converter with 12-bitresolution. The signal-input range is from 1 to 5volts. A 4-to-20 milliamp current input is accommo-dated with a socketed 250-ohm resistor (supplied).

AI Circuit Schematic (Current Loop Mode)

Analog Outputs

The I/O card Analog Outputs (AOs) provide a currentoutput for powering analog devices.

The AO is a 4 to 20 milliamp loop signal. The AOuses a 12-bit D/A converter and a voltage-to-currentconverter.

+

-

C3-C4

CONTROL

DOC0311J

AO

AO Circuit Schematic

Discrete Inputs

Discrete Inputs (DIs) monitor the status of relays,solid-state switches, or other two-state devices. TheDIs can be configured in either of two modes:standard or latched.

There are two dedicated DIs and eight selectableDIs, which can also be individually configured asdiscrete outputs. The dedicated DIs use isolatedsourcing power, while the selectable DIs can sourceeither isolated or non-isolated power. For both DItypes, the signal from the field is coupled through anoptical isolator.

+

–

B11-C2;C7-C8

Vs

DOC0309J

DI

DI Circuit Schematic

Discrete Outputs

The I/O card Discrete Outputs (DOs) control two-state devices such as motor and pump relays. TheDOs can be configured to be used in any of thesemodes:

♦ Latched mode♦ Timed Discrete Output (TDO) mode♦ TDO Toggle mode (variable pulse width)

The I/O card provides two dedicated DO relaychannels and eight selectable DOs, which can alsobe configured as DIs. The DO relays providenormally-open contacts, while the selectable DOsare normally-open, solid-state switches that areused for activating externally-powered devices.

DO

VS

CONTROL

–

NO

B9-B10

DO Relay Circuit Schematic

Specification Sheet Page 33:IOB2

Selectable DO Circuit Schematic

Pulse Inputs

Pulse Inputs (PIs) are used for sensing and countingpulses from pulse-generating devices. The I/O cardpulse inputs consist of two high-speed pulse counterinputs, each sourced from the power converter.

The pulse input, after optical isolation, is routed to apulse accumulator, where the pulses are countedand accumulated.

PI Circuit Schematic

Specifications

ANALOG INPUTS

Quantity/Type: 8 single-ended, voltage-senseAnalog Inputs (current loop if scaling resistor isused).

Terminals: “+T” loop power, “+” positive input,“-” negative input (common).

Signal: 1 to 5 Vdc, software configurable. 4 to 20mA, with 250Ω resistor (supplied) installed insockets on back of I/O card.

Accuracy: 0.1% over –40 to 65°C (-40 to 149°F)range.

Isolation: 2500 V from processor.

Input Impedance: 1 MΩ.

Filter: Double-pole, low-pass.

Resolution: 12 bits.

Conversion Time: 200 µs.

Sample Period: 50 ms minimum.

ANALOG OUTPUT

Quantity/Type: 2 current-loop signal outputs.

Terminals: “+” positive output and “-” common.

Range: 4-20 mA with 0 to 22 mA overranging.

Loop Resistance: 300 ohm Max. at 12 Vdc sourcevoltage.

Resolution: 12 bits.

Accuracy: 0.1% of full-scale output.

Settling Time: 100 µs maximum.

Reset Action: Output goes to zero percent outputor last value (software configurable) on power-up(warm start) or on watchdog timeout.

DISCRETE INPUTS

Quantity/Type: 2 contact-sense Discrete Inputs.Up to 8 additional DIs available when SelectableDI/DO is so configured (see below).

Terminals: “+” positive input; “–” negative input(common, shared between pair of DIs).

Signal Current: 0.5 to 3.5 mA in the active (on)state, 0 to 0.2 mA in the inactive (off) state.

Isolation: 2500 V from processor.

Frequency: 50 Hz maximum.

Sample Period: 10 ms minimum.

DISCRETE OUTPUTS

Quantity/Type: 2 dry-contact relay outputs. Up to 8additional DOs available when Selectable DI/DO isso configured (see below).

Terminals: “NO” normally-open contact; “-”common.

Contact Rating: 30 Vdc, 5 A maximum.

Isolation: 3000 volts.

Frequency: 10 Hz maximum.

Specification Sheet Page 4

Emerson Process Management

Flow Computer DivisionMarshalltown, IA 50158 U.S.A.Houston, TX 77065 U.S.A.Pickering, North Yorkshire UK Y018 7JA

© Fisher Controls International, LLC. 2001-2003. All Rights Reserved.

3:IOB2

Specifications (Continued)

SELECTABLE DI/DO

Quantity/Type: 8 channels, individually switch-selectable as either a contact-sense DI or a solid-state relay DO.

Terminals: “+” positive input for DI or normally-open contact for DO; “-” common (shared betweenpairs of channels).

DI Signal Current: 0.5 to 3.5 mA in the active (on)state, group-sourced either from non-isolated orisolated on-board power (jumper selectable). 0 to0.2 mA in the inactive (off) state.

DO Contact Rating: 120 Vdc, 0.15 A maximum.

Isolation: 2500 V for DI; 3000 V for DO.

Frequency: 50 Hz max. for DI; 5 Hz max. for DO.

PULSE INPUTS

Quantity/Type: 2 sourced, high-speed pulsecounter inputs.

Terminals: “+” positive input, “-” negative input(common).

Isolation: 2500 Vdc.

Frequency: 10 kHz maximum.

Signal Current: 0.5 to 3.5 mA in the active (on)state, 0 to 0.2 mA in the inactive (off) state.

POWERInput: 8 to 15 Vdc (supplied by main processorcard), 40 mA typical without I/O devices.AI Loop: 12 Vdc nominal from internal powerconverter; 24 Vdc can be supplied externally.Available at +T terminals of all AI channels.

FIELD I/O ISOLATION1000 Vdc minimum.

DIMENSIONS21 mm H by 137 mm W by 160mm L (0.8 in. H by5.4 in. W by 6.3 in. L).

WEIGHT0.45 kg (1 lb) nominal.

ENVIRONMENTAL

Meets the Environmental specifications of theFloBoss 503 or 504 unit in which the card isinstalled, including Temperature and Voltage Surgespecifications.

APPROVALS

Covered by the CSA approval for the FloBoss 503or 504 unit in which it is installed.

FloBoss and ROCLINK are marks of one of the Emerson Process Management companies. The Emerson logo is a trademark and service mark of EmersonElectric Co. All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only. While every effort has been made to ensure informational accuracy, they are not tobe construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. Fisher Controlsreserves the right to modify or improve the designs or specifications of such products at any time without notice.